package com.lanyou.cook.util;

import java.util.Random;

public class RandomUtil {

	public static String getRandomPwd(int length){
			String val = "";
				
			Random random = new Random();
			for(int i = 0; i < length; i++)
			{
				String charOrNum = random.nextInt(2) % 2 == 0 ? "char" : "num"; // 输出字母还是数字
					
				if("char".equalsIgnoreCase(charOrNum)) // 字符串
				{
					int choice = random.nextInt(2) % 2 == 0 ? 65 : 97; //取得大写字母还是小写字母
					val += (char) (choice + random.nextInt(26));
				}
				else if("num".equalsIgnoreCase(charOrNum)) // 数字
				{
					val += String.valueOf(random.nextInt(10));
				}
			}
			return val;
		}
	
	
	
	/*public static void main(String[] args) {
		RandomUtil.getRandomPwd(6);
	}*/


}
